Record details

    Variability of total and mobile element contents in ash derived from biomass combustion
    Hanzlíček, Tomáš
    Ochecová, P.
    Perná, Ivana
    Száková, J.
    Tlustoš, P.
Publication type
    článek v odborném periodiku
Source title - serial
    Chemical Papers
    Roč. 67, č. 11
    s. 1376-1385
    Projekt: QI102A207, GA MZe3cav_un_auth*0263180
    Rozsah: 10 s. : P
Subject category
    biomass combustion
    bottom ash
    element contents
    fly ash
Abstract (in english)
   Seven samples of the ash derived from biomass, representing both fly and bortím ash, were analyse for a wide spectrum of total and mobile contents of nutrient and potentially risk elements. Several techniques, X-ray fluorescence (XRF) spectrometry, instrumental neutron activation analysis(INAA), proton-induced gamma-ray emission (PIGE) and proton induced X-ray emission (PIXE),inductively coupled plasma-atomic emission spectrometry (ICP-OES), and flame atomic absorption spectrometry (F-AAS) were compared. The results showed fairly good agreement between the XRF and INAA results, where the correlation coefficients (r) varied between 0.96 and 0.98. Lower contents documenting insufficient dissolution of the ash samples in the applied acid mixture were observed for both ICP-OES and AAS. In this case, weaker correlation with the INAA results not exceeding r = 0.7 were obtained. Therefore, the sample decomposition step is a bottleneck of the accurate analysis of this type of materials.
   For the assessment of plant-available portions of the elements in the ash samples, the Mehlich III extraction procedure and the extraction with a 0.11mol L−1 solution of CH3COOH were applied. The results showed relatively low mobility of the elements (especially micronutrients) in the ash samples regardless of their source and composition, suggesting limited immediate effect of direct ash application as a fertilizer.
    AV ČR Brno, Ústav struktury minerálů a hornin
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Import date
    24. 10. 2014